Indicating device



June 1933,- D. D. RCSENBURGH 1,912,729

INDICATING DEVICE Filed Sept. 18, 1931 INVENTOR Dara/00d D- Rosen bury/7 ATTORNEY Q QWL Patented June e, 1933 uNr-rso mm rATsNr orrlcr.

nunwoon' n. not. or aocn ns'rm} roar. mentor. n manor. ms'mm m co umn. or momma, new 1931, a CORPORATION or. raw roux IIDICA'I'ING'DIVIOI A man nee lentcubcr 1mm. mm Io. seam.

' This invention relates to indicating devices having a movable pointer such as is employed in devices for indicating temperature, pressure and the like.

5 In the past it has been customary, when setting the pointer of such a device for zero reading, to adjust an operating arbor and.

its attached pointer, wit respect to the actuatin mechanism of the device. This adjustab e mounting of the arbor, however, increased the cost otmanufacturin said instruments, and also complicated t e adjustment of the indicator, since it was necessary to change-the relation between the; arborand thepactuating mechanism. Such an adjustment also necessitated-the use of a tool to adjust the mechanism, all included within the casing of the device behind the dial thereof.

In accordance with the present invention, a novel arrangement is provided in an indieating .device for adjusting the index or pointer with res ct to the arbor on which it is mounted, w iercby the adjustable parts are. so positioned that it is unnecessary to disturb the actuating mechanism of the pointer. Another feature of the invention comprises means infront of the dial of anindicating device whereby the arbor may be M held in fixed position while the pointer, which is frictionally held thereon, may be ad'usted.

hose and other features of the invention will ap or from the detailed description and claim when taken with the drawing in which Fig. 1 is a front view of an indicating device incorporating the present invention, in which device a portion of the dial is broken away to indicate more clearly the operating mechanism of the pointer; Fig. 2 is a side view with a portion of the case broken away; Fig. 3 is a to view of a.

pointer and its mou'ntinggand ig. 4 is a. sectional view of the pointer taken on the line 4-4 of Fig. 3.

While the present invention is not limited to any specific type of indicating device, the instrument representedin 1 and 2 show one articular application of the invention.

he indicating device herein disclosed, comprises a base 1, operating mechanism supported thereon and an annular casing 2 surrounding the mechanism, the front end of which casing is closed by a glass 4 held in lace by means including flange 3. 66 On the ase there is mounted a Bourdon spring generally designated 5, which spring is actuated in the well known manner by changes in fluid or vapor pressure within a capil ary 6, attached to a bulb (not shown) 00 which is ex osed to changing conditions to be indicate It will be noted that one end of this ca illary terminates at one end of the Bow on spring 5, which end of this spring is preferabl mounted on the base 1 as as shown at point The other or free end of this spring is fastened to a link 8 pivoted to one end of the bell crank lever 9 which is pivoted on the pin 10. On the other arm of the bell crank lever, there is secured a 70 free end of the arbor is gradually tapered.

On the end of the arbor extending through the dial there is mounted a pointer 15 which is movable-over the graduations on the dial in accordance with the movements of the arbor as" actuated by the 0 rating mocha-i so nism within the casing. his 0 rating mechanism, 'ust described, is we -known and is. described for the urpose of iving a proper background for escribing t e present invention. It will be understood that as the indicatin mechanism may vemploy either a Bour on spring or a capsular diaphragm, as occasiondemands.

Prior to ap licants invention, it hasbeen customary to x the pointer 15 on the arbor w ermanently and. when it was desired to adust the pointer to give the proper zero reading, it was necessary to adjust the axial position of the arbor in order to change'the ad'ustment of the pointer. I

n accordance with the present invention,

it is. proposed to ad'ust the position of the inter relative to t e arbor without injurmg the actuatin mechanism of the device.

In order to ac ieve this result, there is driven on the tapered arbor to give a relatively fixed mounting, a circular disk 16 having its top face 17 beveled and knurled. In the top surface of this diskvthere is ro- 5 vided an annular recess 18, defining a ub provided with a shoulder. One surface of the pointer 15 engages this shoulder and the other surface of the pointer engages a washer 21, which is held on the hub b the upset flange 22 thereof. 1 A spring 19 o corrugated contour engages the bottom of the recess and the under surface of the pointer 15, to hold the same in frictional enga ement with the washer 21. When it is esired to adjust the pointer 15 with respect to the zero setting on the dial scale, the casing is removed and the knurled dlsk 16 is rasped to hold the arbor 13 in relatively x e position, at the same time the pointer 15 is moved frictionally on disk of the arbor to a proper zero setting.

The present disclosure is merely typical of apphcants invention, and it will be understood that there may be variations and modifications thereof within the scope of the claim, without departing from the present invention.

I claim:

In e device of the character described, 22:.

W rotatable arbor, means for i'otetin the same, it member secured on the end 0 seid arbor, said member being provided with en nnnuier recess defining e hub n pointer mounted on eeid huh, menus mciuding e washer for holding said pointer on seid hub, and e sprin in said recess for holding said pointer in irrictionei engagement with WLtShQR.

In testimon whereof I efiix my signnture.

nuniv' on n. nosenennen. 

